Acknowledgments:An earlier version of this paper was the recipient of the 2015 Chris Voss Best Paper Award granted at the 22 nd European Operations Management Association conference. We are most grateful to the EurOMA Scientific Committee for choosing our paper and encouraging us to consider IJPDLM as a publication outlet for our research. We also acknowledge the helpful feedback received at the conference. Moreover, we would like to thank the three anonymous reviewers at IJPDLM who have provided extremely insightful and constructive suggestions which helped us to improve this paper substantially. Finally, we express our gratitude to the Editor, Alexander E. Ellinger, for facilitating a speedy review process. Design/methodology/approach -A dyadic case study design was adopted with a Western European buyer and six of its Chinese suppliers. The database consists of 41 interviews and 81 documents.Findings -Contextual barriers to SDS in global supply chains derive from complexities in the sustainability concept, socio-economic differences, spatial and linguistic distance, as well as cultural differences between buyers and suppliers. Partial remedies include effective joint communications, an open organizational culture, and the fostering of cross-contextual understanding.Research implications -The findings contribute to theory development at the intersection of sustainable and global supply chain management research. They help to explain why scarce sustainability-related progress in global supply chains has occurred in recent years.Practical implications -The identified barriers facilitate managerial decision making that will expedite SDS progress in global contexts.Social implications -By diffusing knowledge regarding available remedies, the study contributes to improving SDS effectiveness, thereby fostering sustainability capabilities and performance of suppliers.Originality/value -This research highlights the criticality of contextual barriers to SDS. The barrier effects that stem from differing real-world conceptions of sustainability may inform future sustainable supply chain management research within and beyond SDS.